Sony's latest tablet, the Xperia Tablet Z, isn't exactly new. While it was announced for Japan last month, Sony fans have been waiting with bated breath for news on worldwide availability and pricing. Today, we have some more information on that front: the Tablet Z is slated to be released across the globe starting in Q2. Furthermore, the US version of the device (which is Wi-Fi only), will cost $499 for the 16GB version, and $599 for the 32GB.